Chemical Bonding and Molecular Structure - Result Question 64
####65. In $BrF_3$ molecule, the lone pairs occupy equatorial positions to minimize
(a) lone pair - bond pair repulsion only
(b) bond pair - bond pair repulsion only
(c) lone pair - lone pair repulsion and lone pair - bond pair repulsion
(d) lone pair - lone pair repulsion only
Show Answer
Solution:
- (c) The possible structures are:
$90^{\circ} l p-l p$
repulsion 0
$90^{\circ} lp-bp$
repulsion 4
$90^{\circ} b p-b p$
repulsion 2
The first structure is minimizing the $l p-l p$ repulsion if we compare it with III. The same is minimizing the $l p-b p$ repulsions if we compare it with II. Also it can be noted that, I structure is not minimizing the $b p-b p$ repulsions.
1
3
2
$0 \quad 2$
